Holboellia angustifolia Wall.

from China, Sichuan, Wolong (pictures 2 & 3)
in Darjeeling, Manebhanjan, July 2003 (picture 5)
in Sikkim, near Gangtok, July 2003 (picture 4)
in China, Sichuan, Kangding, September 2005 (pictures 6 & 7)

Description in Tent. Fl. Nep. 25. t. 17